Hercules Speaker Adaptor is safe and secure and fits speaker mounts from 3.5cm-4cm (1.38″ – 1.57″).

The Quick-N-EZ Speaker Adaptor expands from 3.5cm-4cm to fit the speaker stand mounts.

The maximum load capacity of the adaptor is up to 50 kg (110.2 Ibs.).

NOTE: If the Speaker Adaptor is not weighted down by the speaker, please turn the top knob counter-clockwise to extend the adapter length. Effect insertion length 9cm – 11cm (3.54″ – 4.33″).